## Search found 10 matches

Fri Dec 02, 2016 2:38 pm
Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
Topic: HW 13.13
Replies: 1
Views: 470

### HW 13.13

The pH of 0.40 m HF(aq) is 1.93. Calculate the change in pH when 0.356 g of sodium uoride is added to 50.0 mL of the solution. Ignore any change in volume.
Mon Nov 28, 2016 10:16 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: HW 12.47
Replies: 1
Views: 403

### HW 12.47

The pKa of HIO(aq), hypoiodous acid, is 10.64 and that of HIO3(aq), iodic acid, is 0.77. Account for the difference in acid strength.
Tue Nov 15, 2016 12:51 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K [ENDORSED]
Replies: 1
Views: 323

### K[ENDORSED]

When do we use Kᶜ instead of K?
Thank you!
Fri Nov 11, 2016 4:32 pm
Forum: Naming
Topic: Naming
Replies: 2
Views: 421

### Naming

When do we use hyphens when naming a specific compound? Also, does anyone have suggestions on how to keep track of all the names and how to study for the quiz?
Thank you!
Thu Oct 27, 2016 6:45 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic Character [ENDORSED]
Replies: 2
Views: 1442

### Ionic Character[ENDORSED]

For each pair, determine which compound has bonds with greater ionic character. a) PH₃ or NH₃; b) SO₂ or NO₂; c) SF₆ or IF₅.
Wed Oct 19, 2016 4:00 pm
Forum: Sigma & Pi Bonds
Topic: Momentum Quantum Numbers [ENDORSED]
Replies: 1
Views: 358

### Momentum Quantum Numbers[ENDORSED]

What are the principal and orbital angular momentum quantum numbers for each of the following orbitals?
a) 2s
b) 6f
c) 4d
d) 5p
Sun Oct 09, 2016 1:35 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Integrated Exercises on Infrared Spectroscopy
Replies: 1
Views: 479

### Integrated Exercises on Infrared Spectroscopy

Infrared spectroscopy is an important took for studying vibrations of molecules. Just as an atom can absorb a photo on suitable energy to move an electron from one electronic state to another, a molecule can absorb a photon of electromagnetic radiation in the infrared region to move from one vibrati...
Thu Oct 06, 2016 2:37 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Hydrogen Spectrum
Replies: 3
Views: 558

### Re: Hydrogen Spectrum

How were you able to arrive at that answer?
Wed Oct 05, 2016 4:26 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Hydrogen Spectrum
Replies: 3
Views: 558

### Hydrogen Spectrum

Lines in the Balmer series of the hydrogen spectrum are observed at 656.3, 486.1, 434.0, and 410.2 nm. What is the wavelength of the next line in the series?
Sun Oct 02, 2016 2:18 pm
Forum: Properties of Light
Topic: Quantum World - Light
Replies: 1
Views: 559

### Quantum World - Light

A lamp rated at 40. W emits blue light at wavelength 470 nm. How many photons of blue light can the lamp generate in 2.0 s? How many moles of photons are emitted in that time interval?